KR100881817B1 - Method for monitoring the operational reliability of rechargeable lithium cells - Google Patents

Method for monitoring the operational reliability of rechargeable lithium cells Download PDF

Info

Publication number
KR100881817B1
KR100881817B1 KR1020020005777A KR20020005777A KR100881817B1 KR 100881817 B1 KR100881817 B1 KR 100881817B1 KR 1020020005777 A KR1020020005777 A KR 1020020005777A KR 20020005777 A KR20020005777 A KR 20020005777A KR 100881817 B1 KR100881817 B1 KR 100881817B1
Authority
KR
South Korea
Prior art keywords
voltage
limit
battery
temperature
specified
Prior art date
Application number
KR1020020005777A
Other languages
Korean (ko)
Other versions
KR20020064866A (en
Inventor
라이너 할트
페테르 닥터.비어케
콘라트 닥터.홀
데잔 닥터.일릭
Original Assignee
미크로바테리에 게엠베하
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 미크로바테리에 게엠베하 filed Critical 미크로바테리에 게엠베하
Publication of KR20020064866A publication Critical patent/KR20020064866A/en
Application granted granted Critical
Publication of KR100881817B1 publication Critical patent/KR100881817B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)

Abstract

Method for monitoring rechargeable lithium cells to ensure their correct recharging in which cell voltage and temperature are measured. If threshold values for voltage and temperature are simultaneously exceeded discharging of the cell is triggered until a lower voltage limit or lower temperature limit is reached. The invention also relates to a corresponding circuit arrangement with first and second threshold value switches (D, C) for voltage and temperature and a logic circuit (E) that detects simultaneous exceeding of threshold values and switches a load (G) on. When one or other of the threshold switches detects a lower limit both of the switches are reset.

Description

충전식 리튬전지의 동작 신뢰도 감시 방법{Method for monitoring the operational reliability of rechargeable lithium cells}Method for monitoring the operational reliability of rechargeable lithium cells

도 1은 발명의 방법을 실행하기 위해 적절한 회로 장치의 개략적인 회로도.1 is a schematic circuit diagram of a circuit device suitable for carrying out the method of the invention.

도 2는 충전/방전 주기동안 CL을 충전하고 CEL을 방전하는 동안 전지 전압의 함수로 전지 정전용량을 나타내는 그래프.Figure 2 is a graph showing the cell capacitance as a function of the battery voltage during charging and discharging the EL C C L during the charge / discharge cycles.

본 발명은 전지 전압 및 전지 온도를 측정하고 감시함으로서 충전식 리튬 전지의 동작 신뢰도를 감시하는 방법에 관한 것이다. The present invention relates to a method for monitoring operational reliability of a rechargeable lithium battery by measuring and monitoring battery voltage and battery temperature.

충전식 리튬/이온 전지는 특별한 충전 기술을 필요로하고, 특히, 지정된 스위치-오프 전압이 정확하게 준수되어야 하고, 충전기가 고장날 경우, 보호 회로가 추가적인 충전을 차단하여야 한다. 이러한 전지가 방전되고 있을 때, 전지에 회복불가한 손상이 가해지는 것을 방지하기 위하여 특정 전압의 하한선을 넘어서는 안될 것이다. 따라서 리튬 이온 전지에 특별한 전자적 보호 스위치가 제공되고, 상기 스위치는 충전 장치가 비정상적으로 동작할 때 지정된 최종 충전 및 방전 전압에서 스위치-오프되며, 상기 스위치는 특별한 보호 장치와 함께, 과도한 전압 수준에 대해 전지를 보호하고 위험한 상황의 발생을 방지하고자 하는 의도를 가진다. 위험한 상황의 발생이란 전해질에 비가역적인 분해를 일으킬 수 있고 전지 손상을 일으킬 수 있는 경우이다. 이러한 감시 기능을 가진 충전기들은 예를 들어 WO 96/15563 호에 설명되어 있다. Rechargeable lithium / ion batteries require special charging techniques, in particular the specified switch-off voltage must be correctly observed, and the protection circuit must block further charging if the charger fails. When such a battery is being discharged, it should not exceed the lower limit of a specific voltage to prevent irreparable damage to the battery. Thus, a special electronic protective switch is provided for the lithium ion battery, which switch is switched off at the specified final charge and discharge voltage when the charging device is abnormally operated, and the switch, together with the special protection device, is used for excessive voltage levels. The intention is to protect the battery and prevent the occurrence of dangerous situations. The occurrence of a hazardous situation is one that can cause irreversible decomposition of the electrolyte and damage the battery. Chargers with such a supervisory function are described for example in WO 96/15563.

발명은 충전식 리튬 전지의 동작 신뢰도를 추가적으로 개선시키는 방법을 구체화하는 것을 목적으로 한다. The invention aims to specify a method for further improving the operational reliability of a rechargeable lithium battery.

발명에 따라, 이 목적은 청구범위 제 1 항의 특징을 이용하여 최초에 언급한 방법에 대해 달성된다. 종속항들은 이 방법의 세부사항을 추가로 구체화하며, 이 방법을 실행하기에 적절한 회로 장치을 추가로 구체화한다. According to the invention, this object is achieved with respect to the first mentioned method using the features of claim 1. The dependent claims further specify the details of this method and further specify the circuit arrangements suitable for carrying out the method.

발명에 따르는 방법은, 전지가 임계 충전 상태나 임계 온도에 더 이상 놓이지 않도록 충분한 정전용량이 여전히 가용할 때까지 전지를 방전시키면서, 고온 및 임계 충전 상태에서의 전기화학적 분해에 대해 리튬 전지를 보호한다. The method according to the invention protects the lithium battery against electrochemical decomposition at high temperatures and critical charge states while discharging the battery until sufficient capacitance is still available so that the battery no longer lies at the critical charge state or critical temperature. .

도 1은 발명의 방법을 실행하기 위해 적절한 회로장치의 개략적인 회로도이고, 도 2는 충전/방전 주기동안 CL을 충전하고 CEL을 방전하는 동안 전지 전압의 함수로 전지 정전용량을 나타내는 그래프이다. 이는 전류 C/2로 실행된다. 1 is a schematic circuit diagram of a suitable circuit device for carrying out the method of the invention, Figure 2 is a graph showing the cell capacitance as a function of the battery voltage during charging and discharging of C EL of C L during charge / discharge cycles . This is done with current C / 2.

배터리 전압 UB는 회로 모듈 A의 보조 전압 UH를 생성하는 데 사용되고, 이는 전체 회로에서 논리 게이트 및 한계값 스위치의 정확한 동작을 보장하는 데 필요하다. 안정한 보조 전압 UH는 최소 배터리 전압보다 상당히 작은 것이 선호된다. 여기서 고려되는 리튬 전지의 배터리 전압은 2.7에서 4.2 볼트 사이이고, 따라서 예를 들어, 안정한 보조 전압은 대략 2.5 볼트일 수 있다. The battery voltage U B is used to generate the auxiliary voltage U H of the circuit module A, which is necessary to ensure the correct operation of the logic gate and limit switches in the entire circuit. It is preferred that the stable auxiliary voltage U H be significantly smaller than the minimum battery voltage. The battery voltage of the lithium cell under consideration here is between 2.7 and 4.2 volts, so for example a stable auxiliary voltage can be approximately 2.5 volts.

온도 센서 B는 주변 온도에 비례하는 전압 신호를 생성하며, 상기 전압 신호는 한계값 스위치 C에 공급된다. 지정된 상한 온도 TG를 넘을 경우, 한계값 스위치 C는 온 상태로 변경된다. 이 한계값 스위치는 히스테리시스 방식으로 배치된다. 이 스위치는 제한 온도 TG 한참 아래의 새 값 이하로 온도가 떨어질 때만 오프 상태로 다시 변경된다. 추가적인 한계값 스위치 D는 배터리 전압이 지정 상한값 UG에 이를 때 온 상태로 변경된다. 이 한계값 스위치 역시 히스테리시스 방식으로 배열되어, 이전에 얻은 한계 전압 UG와 차후에 발생하는 전압 사이에 충분한 간격에 이를 때까지 오프 상태로 다시 변경되지 않는다. 두 한계값 스위치 C와 D로부터의 출력 신호는 논리 게이트에 공급되고, 온도와 전압 모두가 지정 한계값에 도달할 때 상기 논리 게이트를 통해 스위치 F를 이용하여 부하 저항 G가 배터리에 연결된다. 전지 전압이 한계값 스위치 D의 한계 전압 UG 한참 아래로 떨어지거나 주변 온도가 한계값 스위치 C의 하한 스위칭 값 밑으로 떨어질 때, 상기 방전 과정이 중단된다. 대략 4볼트의 전압이 상한 전압으로 선택되는 것이 선호된다. 이는 90%의 전지 충전 상태에 상응하며, 상한 온도 TG는 약 80℃로 정해진다. 두 한계값들을 모두 넘을 때 발생하는 전지의 방전은 대략 3.82볼트의 전압까지 내려가도록 실행되어야 하고, 다시 말하자면 70%의 충전 상태로 내려가도록 실행되어야 한다. 그러나, 전압을 3.9볼트까지만 떨어뜨리고 70℃나 60℃를 온도 하한값으로 선택하는 것도 방전 과정에서 충분할 수 있다. The temperature sensor B generates a voltage signal proportional to the ambient temperature, which is supplied to the limit switch C. When the specified upper limit temperature T G is exceeded, the limit switch C is switched on. This limit switch is arranged in a hysteresis fashion. This switch will be switched off only when the temperature drops below the new value well below the limit temperature T G. The additional limit switch D is switched on when the battery voltage reaches the specified upper limit U G. This limit switch is also arranged in a hysteresis fashion so that it does not change back to an off state until a sufficient distance is reached between the previously obtained limit voltage U G and a subsequent voltage. The output signals from both limit switches C and D are supplied to the logic gate, and the load resistor G is connected to the battery using the switch F through the logic gate when both temperature and voltage reach a specified threshold. The discharge process is stopped when the battery voltage falls below the threshold voltage U G of the limit switch D or the ambient temperature falls below the lower switching value of the limit switch C. It is preferred that a voltage of approximately 4 volts is chosen as the upper limit voltage. This corresponds to a battery state of charge of 90% and the upper limit temperature T G is set at about 80 ° C. Discharge of the battery when both thresholds are exceeded should be carried out to a voltage of approximately 3.82 volts, that is to say, 70 percent of the charge. However, dropping the voltage to only 3.9 volts and selecting 70 ° C. or 60 ° C. as the lower temperature limit may be sufficient during the discharge process.

전압 및 온도 하한값은 각 시스템에 대해 명확하게 규정되고 결정되어야 한다. 하한 전압값을 결정하기 위해, 하한 전압은 다음과 같이 선택된다. 즉, 방전 과정의 말미에, 전압이 다시 상한값 위로 회복하지 않아서 회로가 진동할 수 없도록, 하한 전압이 선택된다. Voltage and temperature lower limits should be clearly defined and determined for each system. In order to determine the lower limit voltage value, the lower limit voltage is selected as follows. That is, at the end of the discharge process, the lower limit voltage is selected so that the voltage does not recover back above the upper limit so that the circuit cannot oscillate.

히스테리시스를 가지는 한계값 스위치를 배치하는 것은 진동 가능성을 방지한다. 설명된 개략적 회로의 기능은 충전식 리튬 전지의 동작을 감시하기 위해 사용되는 공지된 IC 회로에 통합될 수 있다. Placing a limit switch with hysteresis prevents the possibility of vibration. The functionality of the described schematic circuit can be integrated into known IC circuits used to monitor the operation of rechargeable lithium batteries.

발명에 따른 측정은, 주변 온도와 전지 전압으로 인해 2차 전기화학 반응이 발생하여 내부 저항 및 정전용량 손실을 증가시키는 충전 상태의 결과로 인한, 고온에서 기계적 및 전기화학적 손상에 대해 충전식 리튬 전지, 특히 리튬 폴리머 전지를 보호할 수 있다.The measurement according to the invention is a rechargeable lithium battery for mechanical and electrochemical damage at high temperatures, as a result of the state of charge resulting in secondary electrochemical reactions due to ambient temperature and cell voltage, which increases internal resistance and capacitance loss, In particular, the lithium polymer battery can be protected.

Claims (5)

전지 전압과 전지 온도를 측정함으로서 충전식 리튬 전지의 동작 신뢰도를 감시하는 방법으로서, 지정 전지 한계 전압(UG)과 지정 주변 한계 온도(TG)를 동시에 넘을 경우, 지정 하한 전압이나 지정 하한 주변 온도에 도달할때까지, 전지가 방전되는 것을 특징으로 하는 방법.A method of monitoring the operation reliability of a rechargeable lithium battery by measuring battery voltage and battery temperature. When the specified battery limit voltage (U G ) and the specified ambient limit temperature (T G ) are simultaneously exceeded, the specified lower limit voltage or the lower limit ambient temperature is specified. Until the battery is discharged. 제 1 항에 있어서, 한계 전압(UG)이 4.0 볼트이고, 한계 온도(TG)가 80℃인 것을 특징으로 하는 방법.The method of claim 1, wherein the threshold voltage U G is 4.0 volts and the threshold temperature T G is 80 ° C. 제 1 항 또는 2 항에 있어서, 하한 전압이 3.9볼트보다 작고, 하한 주변 온도 한계가 70℃인 것을 특징으로 하는 방법.The method of claim 1 or 2, wherein the lower limit voltage is less than 3.9 volts and the lower ambient temperature limit is 70 ° C. 제 1 항 또는 2 항에 있어서, 하한 전압이 3.82 볼트이고, 하한 온도가 60℃인 것을 특징으로 하는 방법.The method according to claim 1 or 2, wherein the lower limit voltage is 3.82 volts and the lower limit temperature is 60 ° C. 제 1 항 또는 2 항에 따른 방법을 수행하는 회로 장치에 있어서, A circuit arrangement for performing the method according to claim 1 or 2, 상기 회로 장치은 전지에서 지정 상한 전압(UG)을 넘을 때 반응하는 제 1 한계값 스위치(D)와, 지정 주변 온도 한계(TG)를 넘을 때 반응하는 제 2 한계값 스위치(C)를 가지며, 제 1 한계값 스위치와 제 2 한계값 스위치가 동시에 응답할 때 전지를 부하에 연결하는 논리 회로(E)를 또한 가지며, 이때, 전지 하한 전압이나 하한 주변 온도에 도달할 때 변경되도록 두 한계값 스위치(C, D)가 장치되는 것을 특징으로 하는 회로 장치.The circuit arrangement has a first limit value switch (D) which reacts when exceeding a specified upper limit voltage (U G ) in a battery, and a second limit value switch (C) which reacts when exceeding a specified ambient temperature limit (T G ). It also has a logic circuit (E) that connects the battery to the load when the first and second limit switches respond simultaneously, wherein the two limit values change so as to reach the lower battery voltage or the lower ambient temperature. Circuit device characterized in that the switch (C, D) is provided.
KR1020020005777A 2001-02-03 2002-02-01 Method for monitoring the operational reliability of rechargeable lithium cells KR100881817B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10104981A DE10104981A1 (en) 2001-02-03 2001-02-03 Procedure for monitoring the operational safety of rechargeable Li cells
DE10104981.1 2001-02-03

Publications (2)

Publication Number Publication Date
KR20020064866A KR20020064866A (en) 2002-08-10
KR100881817B1 true KR100881817B1 (en) 2009-02-03

Family

ID=7672797

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020020005777A KR100881817B1 (en) 2001-02-03 2002-02-01 Method for monitoring the operational reliability of rechargeable lithium cells

Country Status (7)

Country Link
US (1) US6570364B2 (en)
EP (1) EP1229339B1 (en)
JP (1) JP4353671B2 (en)
KR (1) KR100881817B1 (en)
CN (1) CN1221056C (en)
AT (1) ATE490473T1 (en)
DE (2) DE10104981A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7081737B2 (en) * 2003-06-19 2006-07-25 O2Micro International Limited Battery cell monitoring and balancing circuit
US20070257642A1 (en) * 2003-06-19 2007-11-08 Sean Xiao Battery cell monitoring and balancing circuit
DE10361360A1 (en) * 2003-12-18 2005-07-14 Varta Microbattery Gmbh Galvanic element
DE102007031557A1 (en) 2007-07-06 2009-01-08 Robert Bosch Gmbh Accumulator with internal unloading device
US8872478B2 (en) * 2010-03-09 2014-10-28 O2Micro Inc. Circuit and method for balancing battery cells
JP5794104B2 (en) * 2011-10-27 2015-10-14 ソニー株式会社 Battery pack, power storage system, electronic device, electric vehicle and power system
DE102011089700A1 (en) 2011-12-22 2013-06-27 Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg Battery e.g. lithium ion battery for e.g. notebook computer, has pneumatically actuated electrical switches that are operated to alter circuitry state when pressure within housing is above threshold value, and trigger safety mechanism
DE102012213100B4 (en) 2012-07-25 2015-08-06 Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg Battery with thermal switch and pneumatically actuated switch and method for safe operation of the battery
DE102013208555A1 (en) 2013-05-08 2014-11-13 Volkswagen Varta Microbattery Forschungsgesellschaft Mbh & Co. Kg Battery with resettable safety device and suitable pole pins
DE102014201054A1 (en) * 2014-01-22 2015-07-23 Robert Bosch Gmbh Method and device for operating a battery, in particular a lithium ion battery, in a consumer
DE102015207043A1 (en) 2015-04-17 2016-11-17 Varta Microbattery Gmbh Battery with pneumo-electric safety switch
US20170264105A1 (en) * 2016-03-08 2017-09-14 Lucas STURNFIELD Method and apparatus for electric battery temperature maintenance
KR20220045450A (en) * 2020-10-05 2022-04-12 주식회사 엘지에너지솔루션 Apparatus for Managing Swelling of Secondary Battery and Method of Controlling the Same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04137371A (en) * 1990-09-26 1992-05-12 Sony Corp Protective device of secondary battery
JPH09233713A (en) * 1996-02-20 1997-09-05 Internatl Business Mach Corp <Ibm> Protective circuit of secondary battery
JPH1056742A (en) * 1996-08-06 1998-02-24 Matsushita Electric Ind Co Ltd Overcharge protective circuit for secondary circuit
JP2001025173A (en) * 1999-07-02 2001-01-26 Denso Corp Set-battery fault determination apparatus and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633573A (en) 1994-11-10 1997-05-27 Duracell, Inc. Battery pack having a processor controlled battery operating system
FR2740554A1 (en) * 1995-10-31 1997-04-30 Philips Electronique Lab SYSTEM FOR MONITORING THE DISCHARGE PHASE OF THE CHARGING-DISCHARGE CYCLES OF A RECHARGEABLE BATTERY, AND HOST DEVICE PROVIDED WITH AN INTELLIGENT BATTERY
JP3248851B2 (en) * 1996-10-29 2002-01-21 エヌイーシーモバイルエナジー株式会社 Battery protection device
US6081101A (en) * 1998-09-04 2000-06-27 Yang; Tai-Her Temperature switch controlled charging circuit
JP3926518B2 (en) * 1999-08-27 2007-06-06 本田技研工業株式会社 Battery control device for hybrid vehicle
DE10361360A1 (en) * 2003-12-18 2005-07-14 Varta Microbattery Gmbh Galvanic element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04137371A (en) * 1990-09-26 1992-05-12 Sony Corp Protective device of secondary battery
JPH09233713A (en) * 1996-02-20 1997-09-05 Internatl Business Mach Corp <Ibm> Protective circuit of secondary battery
JPH1056742A (en) * 1996-08-06 1998-02-24 Matsushita Electric Ind Co Ltd Overcharge protective circuit for secondary circuit
JP2001025173A (en) * 1999-07-02 2001-01-26 Denso Corp Set-battery fault determination apparatus and method

Also Published As

Publication number Publication date
JP4353671B2 (en) 2009-10-28
DE10104981A1 (en) 2002-08-08
EP1229339A3 (en) 2003-06-18
US20020105304A1 (en) 2002-08-08
ATE490473T1 (en) 2010-12-15
CN1379499A (en) 2002-11-13
JP2002289264A (en) 2002-10-04
EP1229339B1 (en) 2010-12-01
DE50214793D1 (en) 2011-01-13
EP1229339A2 (en) 2002-08-07
US6570364B2 (en) 2003-05-27
CN1221056C (en) 2005-09-28
KR20020064866A (en) 2002-08-10

Similar Documents

Publication Publication Date Title
JP3212963B2 (en) Secondary battery control circuit
KR100751844B1 (en) A method and apparatus of providing device protection for a battery operated device
US6222346B1 (en) Battery protection device
CN106169782B (en) Battery protection integrated circuit, battery protection device and battery pack
US6873135B2 (en) Battery pack and battery pack checking method
KR101245412B1 (en) Charging and discharging control circuit and battery device
US7898216B2 (en) Rechargeable battery device having a protection circuit for protecting from overcharge and overdischarge
JP3848574B2 (en) Charge / discharge control device
KR100881817B1 (en) Method for monitoring the operational reliability of rechargeable lithium cells
CN1988315B (en) Battery state monitoring circuit and battery device
EP2330431A1 (en) Battery pack and method of sensing voltage of battery pack
US20100141219A1 (en) Battery protection circuit
WO2005094512A2 (en) Secondary battery protection circuit with over voltage transient protection
CN101322295A (en) Battery pack, and battery protecting method
KR100777884B1 (en) A charge/discharge control circuit and a charging-type power-supply unit
JP2009095162A (en) Battery pack and power tool using the same
US7605565B2 (en) Battery pack with protection circuit
US7948210B2 (en) Battery pack and electric tool
JP3398304B2 (en) Voltage measurement circuit for secondary battery and protection circuit using the same
JP2004120849A (en) Secondary battery unit equipped with external protective circuit
KR100601557B1 (en) Battery management unit and its method
JP5474438B2 (en) Secondary battery device
JP2007020399A (en) Protective device of secondary battery
JP2005312140A (en) Charging and discharging control circuit
JP3872134B2 (en) Secondary battery protection device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130116

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20140117

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20150122

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20160125

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20170120

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20180119

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20190117

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20200120

Year of fee payment: 12